Pick.



G. B. YEANEY.

` PICK. APLIGATION FILED APR,10,1908.

GILLESPIE B. YEANEY, OF GLEARFIELD, PENNSYLVAYI.

PICK.

Specification oi' Letters Patent.

Patented Nov. 10, 1908.

Application filed April l0, 1908.- Serial No. 426,324.

To (LLL whom di may concern Be it known that l, Girnnsrm E. YEANEY, acitizen of the United States. residing at Gleartielth in' the county oi:Clearfield and citate ot' i'gemtsylvania, have invented a new and usefulPick, ot which the following is' a specific-ation.

This inventitm relates to picks designed more especially for Ithe use ofminers although applicable to picks of other types, and has ior itsobject: to provide a tool of this character with removable points whichmay be easily and quickly changed for pointsI of different shape, or torsharp points when those in use have become dulled. To thisI end the armsof the pick have their ends socketed for the insertion of cur-ved ortapering shankeI on the removable points each shank provided with athreaded end for a nut seated in a depression formed in the inner Isideof the arm near its end.

With this object in view the invention consists oi) the const rnctionand arrangement ot partshereinafter described and claimed andillustratedl in the accompanying drawing,v forming a part ot thisspecification in whichf- Figure 1 is a side elevation of a.. portion ota pick partly broken away; F 1g. 2,1m ele 'ation oi. the inner side ofone of the pick arms showing the point attached; and Fig. 3 aperspective view ot' the point detached.

Similar reference numerals are used fo the same partsl in all theIigures.

The numeral 1 indicates the pick head having the usual eye l for thehandle 3 and oppositely extending arms 4, one arm only, however. beingsho'ywn as the other arm is a mere duplication thereot'. The end 5 ofeach arm 4 is made t'latl and perpendicularly disposed with relation tothe axis of said arm.

llxtcnding inwardly from the end 5 o'i" the arm is a socket. tor theShank 7 on the inner end ot' a removable point or bit S which may have apointed, chisel-shaped or other t'orm ot working end 9. The shank 7 ispreferably rectangu'lar or other polygonal torni in cross section andwider from within out 'ardly where it joins the point S than at its freeend, its tapering shape being produced by curving the outer side 10.rlhe lateral sides of the shank are .substantially parallel from end toend as showny while the inner side 11 is straight t'or about one halfits length and slightly concave for the other or upper half to make moreeasy the insertion and removal of the Shank into and from the Socket.Projecting at a. right angle from the straight portion oit the innerSide oi? the Shank 7 and at the end of Said Shank is a shortstad 12exteriorly threaded for a nut 13 by means of which the point 8 is madefast to the arm of the piek.

ored or otherwise formed. in the inner side of the pick arm 4 .near itsend G is a circular or other shaped depression lat coinmunicating withthe bot-tom of the socket 6, into which deln'ession the threaded Stud 12projects when the pick point 8 is in place. 70 As thus seated, the axisof the threaded stud is coincident with the axis of the depression 11and perpendicular to the inner side of the arm 14. lt' the nut 13 be nowscrewed on the stem 12 until it is seated against the 75 hase otthedepression, the point 8 will be rigidly held in place. The inner sideof the pick will present a smooth practically unbroken surface as thenut is preferably made circular. of the same diameter ae the depressionand its outer face as well as the end of the stud 12 are iush with theside of the arm. 'l-he outer face of the nut 13 may be slotted as shownor provided with perforations for a screw driver or wrench to rotate thenut.

A piek thus constructed is simple cheap and serviceable .as one pickonly need be carried by a workman who7 with a number of points which canbe quickly attached to the piek arms when necessary is ready at alltimes to operate on any class of material that may be encountered.

What is claimed is 1. A pick having a separable point provided with ashank of angular cross Sectionf a curved side and an opposite sidepartly concave and partly straight with a tl'neaded' projection at'. aright; angle therefrom, said 'shank being adapted to 100 he tted in a.socket of similar shape formed in A the end of one of the arms of saidpick and Said threaded shank axially disposed in a depression in theside of said arm comn'ninieating with the socket .105 by an elongatedopening, and. a nut for said stud fitting said depression for securingthe point on the pick, said outer face of the nut lying flush with theside of the pick arm.

Q. pick having a separable point pro-Q10 videdwith a shank of angularcross section, said shan: having a convexly curved forward side' and anoppositel side partly concave and partlystraight, with a threaded studprojecting from the extreme end thereof at right angles to said straightportion, an

' arm on said pick provided with a socket of a shape similar to saidshank 'and having a recess on the rear thereof, extending over the sidesand ends o f the socket to form a shoulder and receive said threadedstud, and a nut for said stud tting said recess for securing 1c thepoint on the` pick.

In testimony that I claim the foregoing as my own, Ivhave hereto aixedmy signature in thevpresence of two witnesses.

GILLESPIE B. YEANEY. Witnesses:

A. SoDERLUN, VICTOR SODERLUND.

